Whoops

103

01:46:57

destroyed a Toshiba 2SC5570 HOT doing this last night.   looking at the simulation, when the output is switched off, the flyback caused a huge negative voltage spike on the collector, pulling current through the base.  is that coreect

published 9 years ago

ETJAKEOC

9 years ago

Small negative voltages on the first and third bases, but the question is, how much current, tie 1uOhm to each base and monitor the current in each and tell me how you feel about that ;)

ETJAKEOC

9 years ago

7.1uW on the first base and 82mW on the third base, which I don't believe should have done it, buuuut, who knows

thebugger

9 years ago

Who knows. Sometimes stuff don't behave the same here as they should in reality. Especially voltage spikes from inductors. You may have calculated 82mW at the base but in reality it could have been 100mW or even a watt no one knows.

ETJAKEOC

9 years ago

Damnit Bugger! You were supposed to know! :p

Secuture

9 years ago

superior toshiba HOT wonder such a lose :((( ...never do it again..... and leave those 10H inductors alone !!! HOT's have 1,5kV colector operating voltage so u must be on some hardcore testing fever to secondary avalanche such panzer BJT

faceblast

9 years ago

Sec how do I get insane volts out of this thing without blowing everything up? I ordered some 25V movs today

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